Geol Test Three

  1. Rocks near the surface deform mostly as brittle. T or F
  2. Beds always dip in the direction of younger beds. T or F
  3. Faults are clearly an example of brittle strain. T or F
  4. Folds and thrust faults are caused by tension in the earths crust. T or F
  5. Most sedimentary rocks were originally deposited as flat-lying beds. T or F
  6. The difference in the arrival time of the P and S wave is related to-

    A. the distance to the earthquake from the seismic station
  7. Which one of the following is consistent with deformation by folding?

    C. the crust is shortened perpendicular to the fold axis
  8. A ___ is a prominent ridge formed by different erosion of a resistant layer of dopping strata.

    C. hogback
  9. A ____ is a flat topped hill that is usually an indication of flat lying strata.

    C. mesa
  10. A sea large wave created by an earthquake is properly called a -

    C. tsunami
  11. If a deformed body recovers its original shape as stress is released, it is said to be -

    A. elastic
  12. Which of the hollowing would NOT be characteristic of an anticline:

    A. horizontal limbs
  13. A structural basin is simply a circular:

    A. syncline
  14. The block of material overlying an inclined fault plane is the:

    C. hanging wall
  15. If the hanging wall has moved down, the fault is -

    D. normal
  16. A bed that dips due east, must strike:

    C. north-south
  17. If the surface exposures (map view) of folded beds resemble Avas or horseshoes, then the folds must be:

    D. plunging
  18. The San Andreas Fault system can be described as -

    E. strike-slip
  19. Geologic structures (faults and folds) are important in oil and gas exploration because -

    A. structures can trap oil and gas
  20. A ___ is a fracture in bedrock along with movement has taken place

    D. fault
  21. In an overturned fold, the limbs dip -

    A. in the same direction
  22. If the fault dips toward the up-thrown block, the fault is-

    B. reverse
  23. If a sequence of beds gets younger toward the east, then they must be dipping to the-

    D. east
  24. We know what the mantle is made of because-

    C. samples of the shallow mantle are brought up in some volcanoes
  25. Show me the Rift Valley of East Africa, and I'll show you a-

    D. diverging plate boundary
  26. The Himalayan Mountains formed by-

    C. continent-continent convergence
  27. The Red Sea is interpreted as-

    A. a flooded rift valley
  28. Most of the world's largest mountain belts were formed in response to-

    C. compressional stress
  29. The Basin and Range Province of the western US are characterized by a large number of-

    D. fault block mountains
  30. A fold that exposes beds that dip in toward the center of the fold is a-

    A. syncline
  31. The low-standing plains between horst-blocks are-

    C. graben
  32. According to the concept of ___, "floating" mountains adjust their elevation in response to the erosion by upward buoyancy as surface material is removed.

    A. isostasy
  33. The Alps, Himalayas, and Appalachains-

    A. are folded mountains
  34. The compass direction formed by the intersection of a dipping surface and a horizontal place is the-

    B. strike
  35. Fractures in rock without movement along the fractures are called-

    B. joints
  36. Source materials for the sedimentary rocks in the Appalachian Mountains was located to the ____ of the present day mountains.

    A. east
  37. The Coast Ranges of Washington, Oregon, and northern California are formed by-

    D. volcanoes
  38. The Andres Mountains of South America are an example of mountains formed by-

    B. ocean-continental convergence
  39. The Basin and Range topography of western US is related to-

    C. stretching the crust
  40. The stable interior of the continent is known as its-

    B. craton
  41. The Texas Hill Country and the Ozark Mountains are examples of mountain or hilly terrain formed by-

    A. dissection by stream erosion
  42. The core of the Sierra Nevada Mountains and Smoky Mountains exposes-

    A. igneous rock
  43. The North American continent has grown progressively-

    C. larger by continental accretion
  44. The term Aorogeny refers to-

    A. mountain building
  45. The oldest rocks in North America can be found in-

    C. Canada
Card Set
Geol Test Three
Answers to Third Exam